package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper..*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    @Before("autoFillPointCut()")
    public void autoFillAspect(JoinPoint joinPoint) {
        log.info("开始填充公共字段");

        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
        // 获取操作类型
        OperationType operationType = annotation.value();
        // 获取当前时间和操作用户
        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();
        // 获取方法参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0){
            return;
        }
        Object entity = args[0];

        // 通过反射填充字段
        try {
            if (operationType.equals(OperationType.INSERT)){
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setCreateTime.invoke(entity,now);
                setUpdateTime.invoke(entity,now);
                setCreateUser.invoke(entity,id);
                setUpdateUser.invoke(entity,id);
            }else {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,id);

            }
        } catch (Exception e) {
            log.error("公共字段填充异常"+e);
        }


    }


}
